Explore from this site the current state of the ionosphere over several participating observatories.
Interactive graphics on the following pages give detailed information for the present time and for
the preceeding 48 hours, from advanced ionospheric sounding instrumentation and data processing methods. Access to earlier analysis results is also provided.

Access to the Dynasonde Database containing analysis results
for EISCAT Tromsø and Svalbard Dynasondes, and also the analysis results for
EISCAT Tromsø, Bear Lake Obs., Utah, and Lycksele, Sweden Dynasondes for
previous years that were originally available on NGDC site.